PET may mean:

• Commodore PET (Personal Electronic Transactor)
• Pierre Elliott Trudeau (1919–2000), an influential Canadian politician
• Preliminary English Test, the second level of the Cambridge University exams in English for Speakers of Other Languages (ESOL)
• Politiets Efterretningstjeneste, the Danish Security Intelligence Service
• Polyethylene terephthalate, a common plastic material
• Positron emission tomography, a three-dimensional imaging technique in nuclear medicine
• Potential evapotranspiration, a measure of the atmospheric demand for water vapour from evaporation and transpiration
• Potentially Exempt Transfer, a concept in UK Inheritance Tax.
• Photoinduced energy transfer (or photoinduced electron transfer), a mechanism of molecular fluorescence
• Parent Effectiveness Training, a method of parenting, pioneered by Thomas Gordon, that emphasizes verbal communication, negotiation, and parent-child equality.
• Personal Electronic Thing, a fictional device and interface mechanism in the video game, Starship Titanic.
• Personal Terminal, a handheld device that houses NetNavis, virtual characters in the video game series Megaman Battle Network.

See also

• Pet